[....] Starting enhanced syslogd: rsyslogd[ 17.552770] audit: type=1400 audit(1518210186.882:5): avc: denied { syslog } for pid=4024 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.619636] audit: type=1400 audit(1518210192.949:6): avc: denied { map } for pid=4165 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.15.204' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 29.992333] audit: type=1400 audit(1518210199.322:7): avc: denied { map } for pid=4179 comm="syzkaller426515" path="/root/syzkaller426515726" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.520118] kasan: CONFIG_KASAN_INLINE enabled [ 30.524829] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 30.532221] general protection fault: 0000 [#1] SMP KASAN [ 30.537746] Dumping ftrace buffer: [ 30.541259] (ftrace buffer empty) [ 30.544943] Modules linked in: [ 30.548111] CPU: 0 PID: 4269 Comm: syzkaller426515 Not tainted 4.15.0+ #306 [ 30.555178] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.564512] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 30.569581] RSP: 0018:ffff8801b17279a8 EFLAGS: 00010202 [ 30.574916] RAX: dffffc0000000000 RBX: ffff8801b157c080 RCX: ffffffff851ac3a0 [ 30.582156] RDX: 0000000000000045 RSI: 00000000cf44bdaf RDI: 0000000000000228 [ 30.589399] RBP: ffff8801b1727c28 R08: 1ffff100362e4e77 R09: 0000000000000002 [ 30.596640] R10: ffff8801b1727878 R11: 0000000000000000 R12: ffff8801b1532dc0 [ 30.603880] R13: ffff8801b1727c00 R14: 0000000000000000 R15: ffff8801b1727ae0 [ 30.611125] FS: 00000000019e4880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 30.619324] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.625176] CR2: 000000002014cfd2 CR3: 00000001b15a6005 CR4: 00000000001606f0 [ 30.632422] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.639663] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.646904] Call Trace: [ 30.649469] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 30.654640] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 30.659979] ? selinux_socket_connect+0x311/0x730 [ 30.664797] ? lock_downgrade+0x980/0x980 [ 30.668920] ? selinux_socket_setsockopt+0x80/0x80 [ 30.673831] ? lock_release+0xa40/0xa40 [ 30.677778] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 30.683635] ? __check_object_size+0x8b/0x530 [ 30.688108] ? __might_sleep+0x95/0x190 [ 30.692065] ? security_socket_connect+0x89/0xb0 [ 30.696807] SYSC_connect+0x213/0x4a0 [ 30.700582] ? SYSC_bind+0x410/0x410 [ 30.704271] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 30.708823] ? vmacache_find+0x5f/0x280 [ 30.712769] ? vmacache_update+0xfe/0x130 [ 30.716897] ? mm_fault_error+0x2c0/0x2c0 [ 30.721016] ? move_addr_to_kernel+0x60/0x60 [ 30.725397] SyS_connect+0x24/0x30 [ 30.728907] ? SyS_accept+0x30/0x30 [ 30.732509] do_syscall_64+0x282/0x940 [ 30.736382] ? __do_page_fault+0xc90/0xc90 [ 30.740589] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.745321] ? syscall_return_slowpath+0x550/0x550 [ 30.750224] ? syscall_return_slowpath+0x2ac/0x550 [ 30.755127] ? prepare_exit_to_usermode+0x350/0x350 [ 30.760117] ? retint_user+0x18/0x18 [ 30.763816] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.768635] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 30.773794] RIP: 0033:0x441149 [ 30.776962] RSP: 002b:00007ffd00a511f8 EFLAGS: 00000207 ORIG_RAX: 000000000000002a [ 30.784641] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000441149 [ 30.791883] RDX: 000000000000002e RSI: 000000002014cfd2 RDI: 0000000000000004 [ 30.799121] RBP: 0000000000007732 R08: 0000000000000000 R09: 0000000000000000 [ 30.806361] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000000000 [ 30.813604] R13: 0000000000402640 R14: 0000000000000000 R15: 0000000000000000 [ 30.820852] Code: fe ff ff e8 d0 e6 55 fc 4c 89 fa 49 8d be 28 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 c6 04 02 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 df 09 00 00 4c 89 fa 48 b8 00 00 00 00 00 fc [ 30.839925] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801b17279a8 [ 30.846532] ---[ end trace de47a58d4078a758 ]--- [ 30.851280] Kernel panic - not syncing: Fatal exception [ 30.856976] Dumping ftrace buffer: [ 30.860489] (ftrace buffer empty) [ 30.864171] Kernel Offset: disabled [ 30.867770] Rebooting in 86400 seconds..